* {
    margin: 0;
    padding: 0;
}
body{
    overflow: hidden;
}
.ok-btn {
    flex: 1;
    margin-left: 20px;
    margin-right: 20px;
    text-align: center;
    box-sizing: border-box;
    border: 1px solid #56dc57;
    border-radius: 5px;
    color: #56dc57;
    background-color: #e8f6e9;
    font-weight: bolder;
    line-height: 30px;
    height: 30px;
    font-size: 14px;
}

.close-btn {
    flex: 1;
    margin-left: 20px;
    margin-right: 20px;
    text-align: center;
    box-sizing: border-box;
    border: 1px solid #a4a4a4;
    border-radius: 5px;
    color: #a4a4a4;
    font-weight: bolder;
    line-height: 30px;
    height: 30px;
    font-size: 14px;
}

/* 旋转动画 指定class为trun即可使用*/
.turn {
    animation: turn 5s linear infinite;
}

/*
turn : 定义的动画名称
10s : 动画时间
linear : 动画平滑
infinite :使动画无限循环
transform:rotate(旋转角度)
%0:动画开始
%100:动画结束
*/
@keyframes turn {
    0% {
        transform: rotate(0deg);
    }

    20% {
        transform: rotate(72deg);
    }

    40% {
        transform: rotate(144deg);
    }

    60% {
        transform: rotate(216deg);
    }

    80% {
        transform: rotate(288deg);
    }

    100% {
        transform: rotate(360deg);
    }
}